I have system with 3.19.3 kernel and libvirt 1.3.3 (version not matter because part of code not changed). When i'm try to get cpu stats via libvirt i have error in libvirt log, that says "cannot parse process status data" relevant code in src/qemu/qemu_driver.c in function qemuGetProcessInfo i'm add debut test to this function and in my case i have always fscanf != 4 qemu pid 7977 cat /proc/7977/stat 7977 (qemu-system-x86) S 1 7976 7976 0 -1 138420608 12728 0 0 0 4819 8249 0 0 20 0 7 0 51378692 4783886336 75779 18446744073709551615 139849472311296 139849478294132 140732912418880 140732912417952 139849400618495 0 268444224 4096 16963 18446744073709551615 0 0 17 5 0 0 15624 744 0 139849480394624 139849482248448 139849496641536 140732912421083 140732912422775 140732912422775 140732912422876 0 cat /proc/7977/task/7977/stat 7977 (qemu-system-x86) S 1 7976 7976 0 -1 138420608 12537 0 0 0 3917 7799 0 0 20 0 7 0 51378692 4783886336 75779 18446744073709551615 139849472311296 139849478294132 140732912418880 140732912417952 139849400618495 0 268444224 4096 16963 0 0 0 17 3 0 0 15624 0 0 139849480394624 139849482248448 139849496641536 140732912421083 140732912422775 140732912422775 140732912422876 0 cat /proc/7977/task/7979/stat 7979 (qemu-system-x86) S 1 7976 7976 0 -1 1077944384 20 0 0 0 0 0 0 0 20 0 7 0 51378696 4783886336 75779 18446744073709551615 139849472311296 139849478294132 140732912418880 139849260591832 139849400637449 0 2147221247 4096 16963 0 0 0 -1 6 0 0 0 0 0 139849480394624 139849482248448 139849496641536 140732912421083 140732912422775 140732912422775 140732912422876 0 cat /proc/7977/task/7982/stat 7982 (CPU 0/KVM) S 1 7976 7976 0 -1 138420416 22 0 0 0 226 118 0 0 20 0 7 0 51378697 4783886336 75779 18446744073709551615 139849472311296 139849478294132 140732912418880 139849222842936 139849400624151 0 2147220671 4096 16963 0 0 0 -1 5 0 0 0 196 0 139849480394624 139849482248448 139849496641536 140732912421083 140732912422775 140732912422775 140732912422876 0 Does somebody have time to fix this ? -- Vasiliy Tolstov, e-mail: v.tolstov(a)yoctocloud.net